The legislature intends to promote the growth of the swine industry in Illinois; to assure the citizens of this State and the American public an adequate and wholesome food supply; to provide for the general economic welfare of both producers and consumers of pork and the State of Illinois; and to provide the swine production and feeding industry of this State with authority to establish a self-financed, self-governed program to help develop, maintain, and expand the State, national, and foreign markets for pork and pork products produced, processed, or manufactured in this State.